I recently installed WB 3.0 with Mathematica 10.0.1 on a Windows 8.1 64 bit machine. All seemed to work fine until I got an error indicating that the workspace I was trying to use could not be created or was in use (I first created \WolframWorkspaces\Base as given in TestProject online Tutorial). However, upon trying to create my own project, which went well I received a similar message that \WolframWorkspaces\Base was in use or unavailble so I created a new Workspace (\Wolfram\Workspaces\Base2)). This worked fine for a while, but then I got the same message and can not get access to my project files (in base2) since WB does not start but repeatedly generates the same error and thus is unable to bring up my projects.

I tried to create yet another Workspace (base3) to bootstrap WB into starting, which it does, and then use the Change Workspace option under file selecting the Base2 file containing my project, but this again blocked WB from restarting/refreshing itself.

I then went to the Windows Task Manager and killed all WB and Mathematica processes, as well as resorted to rebooting, but it seems as if there is a ghost Eclipse session still running somewhere on my machine blocking WB from using the Workspace containing my projects as the behavior will not correct itself, essentially rendering WB inoperable.

Has anyone else encountered this problem, have any idea of what is going on, or have a solution to this issue?